Word " flag "

A definition for the word "flag" (in English)
actually caused the editors of the DoV
more problems than any other. In the end we decided to go with a
completely generic, non-exclusive definition, and that it was far
more useful to detail flags by their type and/or usage —
hence the single definition under
FLAG, and multiple definitions
under BANNER,
ENSIGN,
STANDARD,
COLOUR etc., etc.
As just one example, we are saying that a
banner of arms
(or armorial banner if you prefer) may — if you so wish
of course — be generically defined as a flag, but is
more specifically detailed under
"banner 1)".Christopher Southworth, 12 Aug 2007

But "flag" also means flat pieces of stone paving a garden
pathway, a type of iris growing in that garden, and, as a verb, to
become weary and tired! Not to mention several meanings that derive
directly from our favorite “vex-ation”, like
«flagging a message» and «flagging a taxicab»
— meaning «to put a vexillological but metaphorical
flag up as a signal».Bill Dunning, 11 Aug 2007